class_docstr: Config metaclass. Used to get the key name and set it on the value.
docstr: Get the name of the key and set it on the key
docstr_tok: ["Get","the","name","of","the","key","and","set","it","on","the","key"]
code: def __new__(mcs, classname, bases, classdict):
      """Get the name of the key and set it on the key"""
      for k, v in classdict.items():
          if isinstance(v, Key):
              v.name = k
  
      return type.__new__(mcs, classname, bases, classdict)
  
imports: from copy import deepcopy
  from pygal import formatters
  from pygal.interpolate import INTERPOLATIONS
  from pygal.style import DefaultStyle, Style
label_desc: Use image node_id 1 for calling the MetaConfig obj's underlying member method code with example usage: obj.__new__(mcs, classname, bases, classdict) and returns: type